/*

 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.jvm.hotspot.code;

import java.util.*;

import sun.jvm.hotspot.debugger.Address;

import sun.jvm.hotspot.oops.*;

import sun.jvm.hotspot.runtime.*;

import sun.jvm.hotspot.types.*;

import sun.jvm.hotspot.utilities.*;

public abstract class CompiledMethod extends CodeBlob {

  private static AddressField  methodField;

  private static AddressField  deoptHandlerBeginField;

  private static AddressField  deoptMhHandlerBeginField;

  private static AddressField  scopesDataBeginField;

  static {

    VM.registerVMInitializedObserver(new Observer() {

        public void update(Observable o, Object data) {

          initialize(VM.getVM().getTypeDataBase());

        }

      });

  }

  private static void initialize(TypeDataBase db) {

    Type type = db.lookupType("CompiledMethod");

    methodField                 = type.getAddressField("_method");

    deoptHandlerBeginField      = type.getAddressField("_deopt_handler_begin");

    deoptMhHandlerBeginField    = type.getAddressField("_deopt_mh_handler_begin");

    scopesDataBeginField        = type.getAddressField("_scopes_data_begin");

  }

  public CompiledMethod(Address addr) {

    super(addr);

  }

  public Method getMethod() {

    return (Method)Metadata.instantiateWrapperFor(methodField.getValue(addr));

  }

  public Address deoptHandlerBegin()    { return deoptHandlerBeginField.getValue(addr);              }

  public Address deoptMhHandlerBegin()  { return deoptMhHandlerBeginField.getValue(addr);            }

  public Address scopesDataBegin()      { return scopesDataBeginField.getValue(addr);                }

  public static int getMethodOffset()                { return (int) methodField.getOffset();                }

  @Override

  public boolean isCompiled() {

    return true;

  }

}